add basic FreeBSD support for utils

src/SPC/builder/freebsd/SystemUtil.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\freebsd;
+
+use SPC\builder\traits\UnixSystemUtilTrait;
+use SPC\exception\RuntimeException;
+use SPC\exception\WrongUsageException;
+
+class SystemUtil
+{
+    /** Unix System Util Compatible */
+    use UnixSystemUtilTrait;
+
+    /**
+     * Get Logic CPU Count for macOS
+     *
+     * @throws RuntimeException
+     */
+    public static function getCpuCount(): int
+    {
+        [$ret, $output] = shell()->execWithResult('sysctl -n hw.ncpu');
+        if ($ret !== 0) {
+            throw new RuntimeException('Failed to get cpu count');
+        }
+
+        return (int) $output[0];
+    }
+
+    /**
+     * Get Target Arch CFlags
+     *
+     * @param  string              $arch Arch Name
+     * @return string              return Arch CFlags string
+     * @throws WrongUsageException
+     */
+    public static function getArchCFlags(string $arch): string
+    {
+        return match ($arch) {
+            'amd64', 'x86_64' => '--target=x86_64-unknown-freebsd',
+            'arm64','aarch64' => '--target=aarch-unknown-freebsd',
+            default => throw new WrongUsageException('unsupported arch: ' . $arch),
+        };
+    }
+}